Pliers



July 13,1926. 1,592,017

1 G. .VAN CAMPEN PLIERS Filed Apl 3, 1924 0 .i gnou/Moz Patented duly 13, 1926;.

GEORGE VAN CAMEEN, F EAST STROUDSBURG, PENNSYLVANIA.

PLIERS.

Application led April 3,

This invention relates to new and useful improvements in tools, and has for its principal object to provide a pair of pliers which is of such a construction as to provide a means for cutting bolts or rivets which are 53 ordinarily difficult to remove.

A further object of the invention is to provide a device of the above-mentioned character, wherein means is associated with the tool for moving the handles thereof outwardly so as to .exert a sufficient pressure thereon to cause the proper operation of the gripping or cutting aws when the tool is in use. f'

A. further object of the invention is to provide a device of the above-mentioned character, wherein the actuating means 'for the handles is swivelly supported thereon so that the same may be actuated from various angles, thus enablin a person to operate the sible. l

A still further object of the invention 1s to provide a device of the above-mentioned A character, which is simple in construction, inexpensive, strong and durable, and furthermore adapted for the purposes for which it is designated. v

Other objects and advantagesof this invention will become apparent during the course of the following description.

ln the accompanying drawing forming a part of the specification and in which like numerals designate like parts throughout the same, y y

Figure 1 is a side elevation of my improved bolt cutter with parts broken away,

Fig. 2 is a fragmentary sectional view of a uoditication of handle actuating means, an 4 Fig. 3 is a detail view of one of the gripping-,elements which may be used in place of the cutters. v

In the drawing' wherein for the purpose of illustration is shown the preferred em-v bodiment of my invention. the numerals 1 and 2 designate a pair of levers which are pivoted as shown at 3 adjacent the lower ends thereof. The lower ends of the levers 1 and 2 respectively are provided with the jaws 4 and 5 respectively, and the same are disposed preferably in arallel spaced relation in the manner clear y shown in the drawing. The jaws 4 and 5 are provided with the threaded recesses or sockets which exe tend inwardly from the inner opposed faces `of this construction tool in positions `w ich are often inacces` 1924. Serial No. 704,013.

of the same, and adapted to be removably supported therein are the threaded Shanks 6 of the cutting elements 7.` rl`he purpose rovides a'means whereby the cutting mem ers 7 may be removed land the gripping members 8 may have their threaded shanks 9 receivable in the threaded sockets provided in the jaw faces. rlihe purpose of this however will be more fully described later.

The uppervportion of the levers 1 and 2 provides handles and the outer ends thereof are enlarged as is shown at 10 and 11 respectively in the drawing. Extending inwardly from the inner faces of the outer ends of the handles and arranged preferably in the enlarged portions 10 and 11 thereof are the sockets 12. Swivelly supported in the sockets 12 are the reduced portions 13l of the blocks 14.

Pivotally supported on the pin 15 which extends transversely through each block 14 are the forked outer ends of the arms 16, 17, 18- and 19 respectively in the manner as clearly shown in the drawing. rlie forked outer ends of each of the arms are arranged on the pivot blocks 11 in overlapping relation. rthe inner end of each of the arms is also forked and the forked inner ends'of the'arms 16 and 18 are pivotally connected by means of the pin .20-to the collar 21. rThe inner forked ends of the arms 17 and 19 are pivoted on the collar 22 by means ofthe transversely extending pin 23.

rlfhe collars 21 and 22 are preferably arranged in vertical alinement and the bore of the collar 21 is smooth, while the bore of the collar 22 is threaded for the hereinafter more lfully described. he pivotal su porting means for the inner forked ends ofp the arms extend outwardly from the opposite sides of each of the collars in the manner as is well known in the art. As is shaft is rotated by the handle 25 provided on the upper end of the shaft. A suitable collar 26 is carried by the upper end of the urposes shaft and suitable ball bearings such as are shownat 27 are disposed between the collar 26 and the collar 21, the latter being adapted for slidable movement on the threaded shaft 24 when the handle 25 is rotated.

By turning the handle 25 in one direction, the collars 21 and 22 will be moved toward each other on the shaft 211 causing the handles to be moved outwardly whereby the jaws l and 5 and the cutting or gripping elements carried therein will be moved into engagement with the object upon which the tool is used. The provision of a handle actuating means of this character will provide for the proper pressure to be exerted on the handles whereby the gripping or cutting elements supported in the inner faces of the jaws will properly function. W'hen the handle 25 is rotated in the opposite direction, the collars 21 and 22 respectively will move from each other on the shaft, thus causing the handles 1 and 2 to be moved inwardly; and to further facilitate the inward movement of the handles, I provide the coil spring 28 which is secured at its respective ends to suitable lugs 29 and 30 respectively, provided on the inner faces of the intermediate portions of the handles in the manner clearly illustrated in the drawing.

In Fig. 2 of the drawing I have shown a modificaton of the handle-actuating means wherein the enlarged portions 10 and 11 of the handles 1 and 2, respectively, are provided with suitable conical-shaped recesses 31 and 32 respectively, the same being arranged in the inner opposed faces of the outer ends of the handles. Adapted to be supported in the conical-shaped recesses 31 and 32 respectively are the conical heads 33 and 34 of the hollow piston 35 and cylinder 36 respectively. Extending upwardly from the outer eno of the hollow piston 35 is the pipe 37. and the same has connection at its upper end with a supply pipe 38. A suitable valve of the two-way type such as is shown at 39 is provided on the upper end of the pipe 37 for the 'purpose of controlling the fluid under pressure which passes from the supply pipe 38 to the pipe 37 into the hollow piston. lVhen the valve which communicates the pipe 38 with the pipe 37 is open,the, fluid under pressure will be caused to pass through the pipe 37 into the piston and against the closed wall of the cylinder, forcing the piston and cylinder apart and simultaneously moving the handles outwardly for the same'purposes as heretofore described.

When it is desired to move the handles inwardly, the valve 39 is actuated so as to close the communication of the pipe 37 with the supply pipe 38 and the outlet in the pipe 37 is then open so that the fluid may be emitted therethrough, thus permitting the hollow piston to move inwardly within the cylinder whereby the handles may be retracted or moved inwardly to their normal inoperative position.

It will thus be seen from the foregoing description, that a tool has been provided which is especiallly adapted for use in cutting bolts or rivets, although the same may be used for any other purpose such as clamping various parts, and by providing an actuating means for the handles wherein the same is swivelly mounted in the outer ends of the handles, a person may readily actuate the tool from various angles, thus rendering the same operable from positions which ordinarily are inaccessible. Furthermore the simplicity of my device enables the same to be manufactured at a very low cost and will be strong and durable. As heretofore stated, the cutting member may be removed from the jaws and gripping members may be substituted therefor as is desired.

IVhile I have shown the preferred embodiment of my invention, it is to be understood that various changes in the size, shape, and arrangement of parts may be resorted to without de arting from the spirit of the invention an the scope of the appended claim.

Having thus described my irisation, what I claim is:

Pliers comprising a pair of pivotally connected handles provided at their outer ends with jaws and provided in their inner opposed faces at their inner ends with recesses forming seats, a fluid-pressure operated device disposed between the recessed ends of the handles, said device comprising a cylinder provided at its closed end with a substantial conical projection extending into the adjacent seat, a hollow piston telescopically fitted into said cylinder, said piston being closed in its outer end and provided with a conical projection extendingmto the remaining seat, a valved fluid intake connected to and carried by said piston, and spring means connected wlth said handles' for moving them toward each other.

In testimony whereof I affix my signature.

GEORGE VAN CAMPEN. 

